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ItemChange

teksilo_scene

Enum ItemChange 

Source 
pub enum ItemChange {

Show 13 variants    LocalPosChanged {
        id: ItemId,
        old: Point,
        new: Point,
    },
    LocalBoundsChanged {
        id: ItemId,
        old: Rect,
        new: Rect,
    },
    TransformChanged {
        id: ItemId,
    },
    VisibilityChanged {
        id: ItemId,
        visible: bool,
    },
    FlagsChanged {
        id: ItemId,
        old: ItemFlags,
        new: ItemFlags,
    },
    OpacityChanged {
        id: ItemId,
        old: f32,
        new: f32,
    },
    ZChanged {
        id: ItemId,
        old: f32,
        new: f32,
    },
    LayerChanged {
        id: ItemId,
        old: SceneLayer,
        new: SceneLayer,
    },
    ParentChanged {
        id: ItemId,
        old: Option<ItemId>,
        new: Option<ItemId>,
    },
    Removed {
        id: ItemId,
    },
    Added {
        id: ItemId,
    },
    PayloadChanged {
        id: ItemId,
    },
    AppearanceChanged {
        id: ItemId,
    },

}
Expand description

A change to an item’s state, fired through Scene::item_change_signal for every mutation. Apps observe to wire snap-to-grid, validation, side effects, etc. The model is “fire after the change has been applied” — by the time the observer sees the event, the Scene already reflects it.

Variants§

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LocalPosChanged

set_local_pos: position in parent coords moved.

Fields

§id: ItemId
§old: Point
§new: Point
§

LocalBoundsChanged

set_local_bounds: AABB in local coords changed.

Fields

§id: ItemId
§old: Rect
§new: Rect
§

TransformChanged

set_transform: local→parent transform changed.

Fields

§id: ItemId
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VisibilityChanged

set_visible flipped IS_VISIBLE.

Fields

§id: ItemId
§visible: bool
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FlagsChanged

set_flags / set_flag changed the bitset.

Fields

§id: ItemId
§old: ItemFlags
§new: ItemFlags
§

OpacityChanged

set_opacity: local opacity multiplier changed.

Fields

§id: ItemId
§old: f32
§new: f32
§

ZChanged

set_z: paint z-order changed.

Fields

§id: ItemId
§old: f32
§new: f32
§

LayerChanged

set_layer: the Under/Over paint band changed.

§

ParentChanged

set_item_parent: logical parent changed.

Fields

§id: ItemId
§old: Option<ItemId>
§new: Option<ItemId>
§

Removed

remove: item is gone.

Fields

§id: ItemId
§

Added

add_item / add_widget: item was inserted.

Fields

§id: ItemId
§

PayloadChanged

set_payload: the type-erased payload of a Delegated heavyweight entry was replaced. A SceneView rebuilds that entry’s widget (re-invokes its delegate) on the next build. Routed through emit_item_change, so mutation_seq advances and the AT-walk gate notices.

Fields

§id: ItemId
§

AppearanceChanged

set_item_fill / set_item_stroke / clear_item_*: a lightweight item’s paint-only appearance (fill / stroke colour or style) changed. Never moves geometry, so the observing SceneView evicts the item’s cached frame and repaints without relayout or rebuild.

Fields

§id: ItemId

Trait Implementations§

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impl Clone for ItemChange

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fn clone(&self) -> ItemChange

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Copy for ItemChange

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impl Debug for ItemChange

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl PartialEq for ItemChange

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fn eq(&self, other: &ItemChange) -> bool

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for ItemChange

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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fn equals(&self, other: &(dyn Any + 'static)) -> bool

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